1887

Abstract

A theory is developed to predict the growth rates of photosynthetic microbes in a photobiological reactor with light-sufficient zones and dark zones. The theory also predicts that in light-limited cultures the maintenance energy will increase in proportion to the duration of the dark period.

The theory was tested and quantitatively confirmed by means of a loop reactor which permitted light and dark periods to be varied with a total cycle time of 40 s. An axenic Chlorella culture grown at the maximum rate under light-sufficient conditions could continue growth at the maximum rate in the dark for 9·2 s. It was found that the maintenance energy was zero in the light, but endogenous metabolism of resting cells in the dark corresponded to a large maintenance energy of 8·8 kJ (g dry wt) h. These results have much significance for the design of photobiological reactors.

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/content/journal/micro/10.1099/00221287-124-1-43
1981-05-01
2021-07-26
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